US 10,833,973 B1Granted

Enabling selection of a bypass path from available paths in an open shortest path first (OSPF) domain and an intermediate system to intermediate system (ISIS) domain

AssigneeJuniper Networks, Inc.

InventorsKrishna K Verma, Nischal Singh

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Abstract

A network device receives an attribute identifying paths associated with an open shortest path first (OSPF) domain of a network and an intermediate system to intermediate system (ISIS) domain of the network, and provides the attribute to other network devices of the network. The network device receives traffic destined for one of the other network devices of the network, and determines that a primary path is unavailable for routing the traffic to the one of the other network devices. The network device selects a secondary path from the paths identified by the attribute. The secondary path is selected based on determining that the primary path is unavailable, and the secondary path is associated with the OSPF domain or the ISIS domain of the network. The network device provides the traffic to the one of the other network devices via the secondary path.

Claims17

Dependent claims

A method, comprising:

receiving, by a network device of a network, an attribute identifying paths associated with an open shortest path first (OSPF) domain of the network and an intermediate system to intermediate system (ISIS) domain of the network, wherein the attribute includes a resource reservation protocol (RSVP) session attribute,
wherein the attribute includes information identifying one or more of:
a secondary path that is in the ISIS domain of the network when the ISIS domain is available or is in the OSPF domain of the network when the ISIS domain is unavailable, or
a secondary path that is in the OSPF domain of the network when the OSPF domain is available or is in the ISIS domain of the network when the OSPF domain is unavailable:
providing, by the network device, the attribute to other network devices of the network;
receiving, by the network device, traffic destined for one of the other network devices of the network;
determining, by the network device, that a primary path is unavailable for routing the traffic to the one of the other network devices;
selecting, by the network device, a secondary path from the paths identified by the attribute,
wherein the secondary path is selected based on determining that the primary path is unavailable for routing the traffic to the one of the other network devices, and
wherein the secondary path is associated with one of:
the OSPF domain of the network, or
the ISIS domain of the network;
and
providing, by the network device, the traffic to the one of the other network devices via the secondary path.

11 more elements

A network device, comprising:

one or more memories;
and
one or more processors to:
receive an attribute identifying paths associated with an open shortest path first (OSPF) domain of a network and an intermediate system to intermediate system (ISIS) domain of the network, wherein the attribute includes a resource reservation protocol (RSVP) session attribute,
wherein the attribute includes information identifying one or more of:
a secondary path that is in the ISIS domain of the network when the ISIS domain is available or is in the OSPF domain of the network when the ISIS domain is unavailable, or
a secondary path that is in the OSPF domain of the network when the OSPF domain is available or is in the ISIS domain of the network when the OSPF domain is unavailable;
receive traffic destined for one of other network devices of the network;
determine whether a primary path is available for routing the traffic to the one of the other network devices;
and
selectively provide the traffic to the one of the other network devices via the primary path or via a secondary path,
wherein the traffic is provided to the one of the other network devices via the primary path when the primary path is available for routing the traffic to the one of the other network devices,
wherein the traffic is provided to the one of the other network devices via the secondary path when the primary path is unavailable for routing the traffic to the one of the other network devices,
wherein the secondary path is selected from the paths identified by the attribute, and
wherein the secondary path is associated with one of:
the OSPF domain of the network, or
the ISIS domain of the network.

14 more elements

A non-transitory computer-readable medium storing instructions, the instructions comprising:

one or more instructions that, when executed by one or more processors of a network device, cause the one or more processors to:
receive an attribute identifying paths associated with an open shortest path first (OSPF) domain of a network and an intermediate system to intermediate system (ISIS) domain of the network, wherein the attribute includes a resource reservation protocol (RSVP) session attribute,
wherein the attribute includes information identifying one or more of:
a secondary path that is in the ISIS domain of the network when the ISIS domain is available or is in the OSPF domain of the network when the ISIS domain is unavailable, or
a secondary path that is in the QSPF domain of the network when the QSPF domain is available or is in the ISIS domain of the network when the QSPF domain is unavailable;
receive traffic destined for one of other network devices of the network;
determine that a primary path is unavailable for routing the traffic to the one of the other network devices;
select a secondary path from the paths identified in the attribute,
wherein the secondary path is selected based on determining that the primary path is unavailable for routing the traffic to the one of the other network devices, and
wherein the secondary path is associated with one of:
the OSPF domain of the network, or
the ISIS domain of the network;
and
provide the traffic to the one of the other network devices via the secondary path.

11 more elements

Dependencies are inferred from the claim text.